In third world countries, rivers are just as essential as they were since the dawn of civilizations. In modern countries, rivers serve as a waterway for transportation, human recreation, and sometimes drinking water.
They believed in the separation of the races.
Smoking became very popular.
Changed diet kept people from starvation.
Corn fed livestock grew in places where other plants couldn't grow in
Answer:
The Preamble states the six purposes of government: to form a more perfect union; establish justice; insure domestic tranquility; provide for the common defense; promote the general welfare; secure the blessings of liberty now and in the future.
